Within reason, water kefir grains like to be warm, but out of direct sunlight. Ambient temperatures of 68°-78°F will yield the best results, though water kefir grains culture well even up to 85°F.

Does kefir need to be kept in the dark?

Kefir doesn’t require light to culture properly, so a dark cupboard is fine, as is a lighted room. Do not expose culturing kefir to direct sunlight.

What kills water kefir?

Raw honey is high in healthy bacteria and likely will kill the kefir cultures.